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- I believe the universe has empty space and atomos (atoms) are invisible!I think atomos are as solid and the same throughout!I believe in ideas instead of experiments.
- Democritus 460 bce - 370 bce
- Dalton 1766-1844
- Let me use air pressure and water vapor to devise my theory.All matter is made up of atoms!elements are composed of identical atomos.
- Atomos have charges.The particle has an electric current.electrons float in a sea of charges.
- J.J. Thompson 1856-1940
- Ernest Rutherford 1871-1937
- I will test the plum pudding model J.J. Thompson had.I will shoot tiny positively charged particles out of a particle gun, toward a thin sheet of gold foil.I will detect reflected particles of various angles.
- Niels Bohr 1885-1962
- electrons occupy specific or exact energy levels.energy levels are specific distances from the nucleus.There are specific amounts of energy that are required to move electrons to the next energy level.
- electrons do not stay in a certain orbit.Let me model a wave equation to identify properties of a wave as well as a partticle.The wave equation can predict the probable location of electrons.
- ErwinSchrödinger1887-1961
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